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If dispatch mode or transparent backend is used, the backend connection target is a proxy instead of a server. In these cases, the reuse of backend connections is not consistent. With the default behavior, no reuse is done and every new request uses a new connection. However, if http-reuse is set to never, the connection are stored by the mux in the session and can be reused for future requests in the same session. As no server is used for these connections, no reuse can be made outside of the session, similarly to http-reuse never mode. A different http-reuse config value should not have an impact. To achieve this, mark these connections as private to have a defined behavior. For this feature to properly work, the connection hash has been slightly adjusted. The server pointer as an input as been replaced by a generic target pointer to refer to the server or proxy instance. The hash is always calculated on connect_server even if the connection target is not a server. This also requires to allocate the connection hash node for every backend connections, not just the one with a server target.
The HAProxy documentation has been split into a number of different files for ease of use. Please refer to the following files depending on what you're looking for : - INSTALL for instructions on how to build and install HAProxy - BRANCHES to understand the project's life cycle and what version to use - LICENSE for the project's license - CONTRIBUTING for the process to follow to submit contributions The more detailed documentation is located into the doc/ directory : - doc/intro.txt for a quick introduction on HAProxy - doc/configuration.txt for the configuration's reference manual - doc/lua.txt for the Lua's reference manual - doc/SPOE.txt for how to use the SPOE engine - doc/network-namespaces.txt for how to use network namespaces under Linux - doc/management.txt for the management guide - doc/regression-testing.txt for how to use the regression testing suite - doc/peers.txt for the peers protocol reference - doc/coding-style.txt for how to adopt HAProxy's coding style - doc/internals for developer-specific documentation (not all up to date)